NordicCNC's build log

[JAZZCNC]

Glad to hear this actually. Of course it is nice with speed and the non-existent noise! Who would not want 20m/min if they could have it. Anyway 10-15m/min will probably be enough for most small businesses and hobbyist (like me) as you said. I will let this thought about steppers sink for a while before I make any decision. The design is still not finalized anyway so no need to rush things.

You can have 20mtr/min speeds with steppers if you choose the right drives/motors along with linear components, the 10x5 vertical machine I've been showing will happily whizz the gantry around at 30mtr/min.

You said you are using Lichuan 8Nm 230Vac for the build with the ATC spindle and that you use Lichuan closed loop system nowadays for your build. I checked aliexpress and they are all either 2 phase or 3 phase. So they work with a 3 phase output but uses only 230V? I did not find any 8Nm steppers, but I found this one: https://www.aliexpress.com/item/3279...52606833P16XMw

Yes, those are exactly what I'm using for Z-axis with 12Nm on X&Y. I think the heading is an error, if you look further down at the spec you'll see it says 8Nm.
This size would be way overkill for your little machine thou. The secret to the speed with steppers, in general, is the relationship between inductance and voltage, but even more so with large motors which is why Mains powered drives work best.

Okay, I will research area more. I read somewhere that GT2 is supposed to be really good quality compared to the commonly used HTD 5.

It's Got nothing to do with quality, that's down to manufacturer and spec. HTD, GT2, etc is the tooth profile. GT2 is actually a modified HTD tooth profile which supposedly offers better handling of torque and speed than HTD.